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  1. #1
    Non-member allanr5gtt's Avatar
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    CNC Engineered Gas Flowed Cylinder head

    hi there just seen this advert on ebay.
    what is the your point of view on using a cnc to porting the head?
    how is porting the head done normally?
    what do you think of the flow chart?

    thanks allan

    http://cgi.ebay.co.uk/Renault-Clio-1...item414e789f91

  2. #2
    Non-member JohnAldridge101's Avatar
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    Re: CNC Engineered Gas Flowed Cylinder head

    CNC in my opinion is the better way to to it, the old fashioned way was done by hand using a die grinder, the beauty of CNC is that all the ports will be matched exactly giving (possible) exact power outputs on each cylinder, and if your developing several heads together it is far quicker and easier let a machine do the hard work and to 0.005mm accuracy.

    http://www.youtube.com/watch?v=kcERvWYUNUw

  3. #3
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    Re: CNC Engineered Gas Flowed Cylinder head

    I tell you what they must have some good kit to achieve those tollerances!

    I wish I knew how to operate a 5-axis CNC's I'd be in work all weekend making bits!

  4. #4
    Non-member Andrew Cooke's Avatar
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    Re: CNC Engineered Gas Flowed Cylinder head

    Quote Originally Posted by Ashy View Post
    I tell you what they must have some good kit to achieve those tollerances!

    I wish I knew how to operate a 5-axis CNC's I'd be in work all weekend making bits!
    and for only an extra £100 they'll make it even better by finishing it by hand....

  5. #5
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    Re: CNC Engineered Gas Flowed Cylinder head

    When I saw "Andrew Cooke" as last poster I clicked on this thread knowing I'd be rewarded either by something incredibly factual or something comically summarizing

  6. #6
    Non-member Bunje's Avatar
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    Re: CNC Engineered Gas Flowed Cylinder head

    if we had five axis where i work i think i would be there every weekend maching any thing and everything aswell. unfortunatly we only have 3 axis comes in quite handy for some bits tho

  7. #7
    Non-member JohnAldridge101's Avatar
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    Re: CNC Engineered Gas Flowed Cylinder head

    Quote Originally Posted by Andrew Cooke View Post
    and for only an extra £100 they'll make it even better by finishing it by hand....

    i dont get it

  8. #8
    Non-member JohnAldridge101's Avatar
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    Re: CNC Engineered Gas Flowed Cylinder head

    Quote Originally Posted by Ashy View Post
    I tell you what they must have some good kit to achieve those tollerances!

    I wish I knew how to operate a 5-axis CNC's I'd be in work all weekend making bits!

    the bridgeport i use at work has .0001" increments (.0025mm) quality bit of kit but only 3 axis

  9. #9
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    Re: CNC Engineered Gas Flowed Cylinder head

    Quote Originally Posted by JohnAldridge101 View Post
    i dont get it
    RTOC sense of humour

    It's Ric wood motorsport so there should be no doubt it'll be a nice job.

  10. #10
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    Re: CNC Engineered Gas Flowed Cylinder head

    Quote Originally Posted by JohnAldridge101 View Post
    the bridgeport i use at work has .0001" increments (.0025mm) quality bit of kit but only 3 axis
    We just spent £500k on a Mazak u8800 which will achieve positional (& repeat) accuracy of 7microns! I doubt you will get anywhere near 2.5microns (tenth of a thou) on a Bridgeport! maybe your decimal place in in the wrong place?

  11. #11
    Non-member allanr5gtt's Avatar
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    Re: CNC Engineered Gas Flowed Cylinder head

    hi all just stripping a engine in the garage and took off the manifolds and it looks like and head had some work done to it or is this how they came std from the factory?

    https://www.rtoc.org/boards/album.php...pictureid=6608

  12. #12
    Non-member allanr5gtt's Avatar
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    Re: CNC Engineered Gas Flowed Cylinder head

    https://www.rtoc.org/boards/album.php?albumid=963

    as its not a cast finish? it looks like it's been manchine at some point?

  13. #13
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    Re: CNC Engineered Gas Flowed Cylinder head

    I ve bought a f4r engine in uk and the engine head has the same finish as yours, it looks the same as yours.

  14. #14
    Non-member Adey aka Ewok's Avatar
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    Re: CNC Engineered Gas Flowed Cylinder head

    thats what f4r heads look like

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